using DocumentCreationSystem.Models;
using DocumentCreationSystem.Models.Memory;
using Microsoft.Extensions.Logging;

namespace DocumentCreationSystem.Services
{
    /// <summary>
    /// Agent推理引擎接口
    /// </summary>
    public interface IAgentReasoningEngine
    {
        /// <summary>
        /// 执行推理
        /// </summary>
        Task<string> ReasonAsync(string agentId, string goal, List<string> premises);

        /// <summary>
        /// 获取推理历史
        /// </summary>
        Task<List<string>> GetReasoningHistoryAsync(string agentId, int maxResults = 50);
    }

    /// <summary>
    /// Agent推理引擎实现
    /// </summary>
    public class AgentReasoningEngine : IAgentReasoningEngine
    {
        private readonly ILogger<AgentReasoningEngine> _logger;
        private readonly IEnhancedAgentMemoryService _memoryService;
        private readonly Dictionary<string, List<string>> _reasoningHistory = new();

        public AgentReasoningEngine(
            ILogger<AgentReasoningEngine> logger,
            IEnhancedAgentMemoryService memoryService)
        {
            _logger = logger;
            _memoryService = memoryService;
        }

        public async Task<string> ReasonAsync(string agentId, string goal, List<string> premises)
        {
            try
            {
                _logger.LogInformation($"Agent {agentId} 开始推理: {goal}");

                // 简化的推理实现
                var reasoning = $"基于目标 '{goal}' 和前提条件 [{string.Join(", ", premises)}]，";
                reasoning += "通过分析和推理，得出以下结论：";

                // 简单的推理逻辑
                if (premises.Any())
                {
                    reasoning += $" 根据提供的 {premises.Count} 个前提条件，";
                    reasoning += "可以推断出相关的解决方案和建议。";
                }
                else
                {
                    reasoning += " 在没有具体前提条件的情况下，建议收集更多信息后再进行推理。";
                }

                // 记录推理历史
                if (!_reasoningHistory.ContainsKey(agentId))
                {
                    _reasoningHistory[agentId] = new List<string>();
                }
                _reasoningHistory[agentId].Add(reasoning);

                _logger.LogInformation($"Agent {agentId} 推理完成");
                return reasoning;
            }
            catch (Exception ex)
            {
                _logger.LogError(ex, $"Agent {agentId} 推理失败");
                return $"推理失败: {ex.Message}";
            }
        }

        public async Task<List<string>> GetReasoningHistoryAsync(string agentId, int maxResults = 50)
        {
            try
            {
                if (_reasoningHistory.TryGetValue(agentId, out var history))
                {
                    return history.TakeLast(maxResults).ToList();
                }
                return new List<string>();
            }
            catch (Exception ex)
            {
                _logger.LogError(ex, $"获取推理历史失败: Agent {agentId}");
                return new List<string>();
            }
        }
    }
}